Manufacturing olefins from gas oil
US5629465A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 15, 1995 |
| Grant date | May 13, 1997 |
| Priority date | — |
| Expiry date | May 15, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC10G2400/20
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
Disclosed is a method of selecting a gas oil feedstock for use in manufacturing olefins. The feedstock is analyzed for the presence of benzothiophenes and is used to manufacture olefins only if it contains less than 50 ppm (as sulfur) of benzothiophenes. The concentration of benzothiophenes can be reduced by distilling the feedstock and removing the fraction of the feedstock that boils between about 45.degree. and about 60.degree. C. under reduced pressure of about 0.05 to about 0.1 mmHg. The concentration of benzothiophenes can also be reduced by passing the feedstock through a benzothiophene adsorber such as activated alumina or activated carbon.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.